The term "efficiency" refers to the ability of a speaker system to convert electrical energy (power from the amplifier) into acoustic output.

术语“效率”是指扬声器系统将电能（功放的推力）转化为声音输出的能力。

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Mode conversion efficiency has been calculated as functions of acoustic frequency, interaction length, guiding layer thickness, and acoustic drive power density.

模式转换效率可化作声波频率、声光作用长度、波导厚度和声波功率密度的函数，并利用数值计算得出结果。

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The environmental responsibility is assumed by simple architectural devices for acoustic and visual comfort, and to achieve greater efficiency in the consumption of water and energy.

简单的建筑设备承担了环保责任，达到声觉和视觉的舒适，并在能源和水的消耗上实现了更高的效率。

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